Question

A polypeptide with a net positive charge at physiologic pH (~7.4) most likely contains amino acids with R groups of what type?

- Aromatic R groups
- Basic R groups
- Aliphatic R groups
- Acidic R groups

Answer 1

A polypeptide with a net positive charge at physiologic pH (~7.4) most likely contains amino acids with Basic R groups.

Step-by-step explanation:

A polypeptide with a net positive charge at physiologic pH (~7.4) most likely contains amino acids with Basic R groups. Basic amino acids such as Arginine (Arg), Lysine (Lys), and Histidine (His) have side chains that are positively charged at neutral pH, allowing the polypeptide to have a net positive charge.